玛格丽特·鲁斯福德
Margaret Rutherford
饰：Grand Duchess Gloriana XIII
罗恩·穆迪
Ron Moody
饰：Prime Minister Rupert Mountjoy
伯纳德·克理宾斯
Bernard Cribbins
饰：Vincent Mountjoy
大卫·柯索夫
David Kossoff
饰：Professor Kokintz
特里-托马斯
Terry-Thomas
饰：Maurice Spender (as Terry Thomas)
朱恩·里奇
June Ritchie
饰：Cynthia
约翰·勒·梅苏里尔
John Le Mesurier
饰：British Delegate
Eric Barker
饰：MI5 Man
Roddy McMillan
饰：Benter
汤姆·奥尔德里奇
Tom Aldredge
饰：Wendover
Michael Trubshawe
饰：British Aide
彼得·萨里斯
Peter Sallis
饰：Russian Delegate
克莱夫·邓恩
Clive Dunn
饰：Bandleader
Hugh Lloyd
饰：Plumber
格拉汉姆·斯塔克
Graham Stark
饰：Standard Bearer
Mario Fabrizi
饰：Valet
Jan Conrad
饰：Russian Aide
约翰·布鲁塞尔
John Bluthal
饰：Max Von Noldol (as John Bluthall)
Archie Duncan
饰：American General
盖伊·迪吉
Guy Deghy
饰：Russian Scientist
理查德·马内尔
Richard Marner
饰：Russian General
艾伦·卡思伯森
Allan Cuthbertson
饰：Member of Whitehall Conference
罗宾·贝利
Robin Bailey
饰：Member of Whitehall Conference
Gerald Anderson
饰：Member of Whitehall Conference (as Gerald Andersen)
Gordon Phillott
饰：Civil Sergeant
约翰·伍德
John Wood
饰：Countryman
George Chisholm
饰：Wine Waiter
Rosemary Scott
Rosemary Scott
饰：Launching Lady
文森特·鲍尔
Vincent Ball
饰：Pilot
Frank Duncan
饰：News announcer
艾德·毕肖普
Ed Bishop
饰：American Astronaut (as Edward Bishop)
Bill Edwards
饰：American astronaut
Laurence Herder
饰：Russian astronaut
Harvey Hall
饰：Russian astronaut
弗兰基·豪尔德
Frankie Howerd
饰：Himself
Beverly Bennett
饰：(uncredited)
Michael Caspi
Michael Caspi
饰：(uncredited)
Paul Cole
饰：(uncredited)
Larry Cross
饰：(uncredited)
史崔格·戴维斯
Stringer Davis
饰：1st Councillor (uncredited)
Lucy Griffiths
饰：Lady-in-Waiting (uncredited)
Sandra Hampton
Sandra Hampton
饰：April (uncredited)
Robert Haynes
Robert Haynes
饰：(uncredited)
默里·卡什
Murray Kash
饰：(uncredited)
Bruce Lacey
饰：Bandleader (uncredited)
Frank Lieberman
饰：American Civilian (uncredited)
Coral Morphew
饰：Peasant Girl (uncredited)
Carolyn Pertwee
饰：June (uncredited)
凯文·斯科特
Kevin Scott
饰：American Journalist (uncredited)
John Phillips
John Phillips
饰：Bracewell - U.S. Delegate